merge revision(s) 7b9476fbfab738d1eb01b4b4c4af9a1680513019: [Backport #17642]

	Ractor.allocate should not be allowed

	Ractor.allocate and Ractor#dup should not be allowed like Thread.
	[Bug #17642]
	---
	 bootstraptest/test_ractor.rb | 18 ++++++++++++++++++
	 ractor.c                     |  2 ++
	 2 files changed, 20 insertions(+)

1 files changed, 18 insertions, 0 deletions

diff --git a/bootstraptest/test_ractor.rb b/bootstraptest/test_ractor.rb
index 1c29a2b799..878b846487 100644
--- a/bootstraptest/test_ractor.rb
+++ b/bootstraptest/test_ractor.rb
@@ -8,6 +8,24 @@ assert_equal 'Ractor', %q{
   Ractor.new{}.class
 }
 
+# Ractor.allocate is not supported
+assert_equal "[:ok, :ok]", %q{
+  rs = []
+  begin
+    Ractor.allocate
+  rescue => e
+    rs << :ok if e.message == 'allocator undefined for Ractor'
+  end
+
+  begin
+    Ractor.new{}.dup
+  rescue
+    rs << :ok if e.message == 'allocator undefined for Ractor'
+  end
+
+  rs
+}
+
 # A Ractor can have a name
 assert_equal 'test-name', %q{
   r = Ractor.new name: 'test-name' do